<!-- wp:buttons {"align":"wide","layout":{"type":"flex","justifyContent":"center"}} -->
<div class="wp-block-buttons alignwide">
	<!-- wp:button -->
	<div class="wp-block-button"><a class="wp-block-button__link">My button 1</a></div>
	<!-- /wp:button -->

	<!-- wp:button -->
	<div class="wp-block-button"><a class="wp-block-button__link">My button 2</a></div>
	<!-- /wp:button -->
</div>
<!-- /wp:buttons -->